Bilateral Quadratus Femoris Oedema ? Muscle strain or tear

Hypothesis that this may be due to impingement between lesser trochanter and ischial tuberosity (see AJR letter)

Ischiofemoral Impingement Syndrome: An Entity With Hip Pain and Abnormalities of the Quadratus Femoris Muscle: AJR 2009; 193:186-190; http://www.ajronline.org/cgi/content/full/193/1/186

http://www.ajronline.org/cgi/content/full/190/6/W379

http://www.ajronline.org/cgi/content/full/190/6/W380